Trim gauges are for hole shot and looks only needles down smash the pedal to the floor and go . When dialing in for top end watch the rpms and gps maybe the water pressure gauge if your raising the jack plate . When it stops making speed you went one tap to high on the trim . That’s it that all you need to do for that day and that load your running . Different props need different motor heights to run there best one motor height will not work for different props and loads .